147 lines
4.1 KiB
JavaScript
147 lines
4.1 KiB
JavaScript
var _util = require("../core/util");
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var inherits = _util.inherits;
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var Displayble = require("./Displayable");
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var BoundingRect = require("../core/BoundingRect");
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/**
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* Displayable for incremental rendering. It will be rendered in a separate layer
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* IncrementalDisplay have two main methods. `clearDisplayables` and `addDisplayables`
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* addDisplayables will render the added displayables incremetally.
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*
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* It use a not clearFlag to tell the painter don't clear the layer if it's the first element.
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*/
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// TODO Style override ?
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function IncrementalDisplayble(opts) {
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Displayble.call(this, opts);
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this._displayables = [];
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this._temporaryDisplayables = [];
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this._cursor = 0;
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this.notClear = true;
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}
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IncrementalDisplayble.prototype.incremental = true;
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IncrementalDisplayble.prototype.clearDisplaybles = function () {
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this._displayables = [];
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this._temporaryDisplayables = [];
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this._cursor = 0;
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this.dirty();
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this.notClear = false;
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};
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IncrementalDisplayble.prototype.addDisplayable = function (displayable, notPersistent) {
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if (notPersistent) {
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this._temporaryDisplayables.push(displayable);
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} else {
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this._displayables.push(displayable);
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}
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this.dirty();
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};
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IncrementalDisplayble.prototype.addDisplayables = function (displayables, notPersistent) {
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notPersistent = notPersistent || false;
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for (var i = 0; i < displayables.length; i++) {
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this.addDisplayable(displayables[i], notPersistent);
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}
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};
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IncrementalDisplayble.prototype.eachPendingDisplayable = function (cb) {
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for (var i = this._cursor; i < this._displayables.length; i++) {
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cb && cb(this._displayables[i]);
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}
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for (var i = 0; i < this._temporaryDisplayables.length; i++) {
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cb && cb(this._temporaryDisplayables[i]);
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}
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};
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IncrementalDisplayble.prototype.update = function () {
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this.updateTransform();
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for (var i = this._cursor; i < this._displayables.length; i++) {
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var displayable = this._displayables[i]; // PENDING
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displayable.parent = this;
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displayable.update();
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displayable.parent = null;
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}
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for (var i = 0; i < this._temporaryDisplayables.length; i++) {
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var displayable = this._temporaryDisplayables[i]; // PENDING
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displayable.parent = this;
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displayable.update();
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displayable.parent = null;
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}
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};
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IncrementalDisplayble.prototype.brush = function (ctx, prevEl) {
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// Render persistant displayables.
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for (var i = this._cursor; i < this._displayables.length; i++) {
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var displayable = this._displayables[i];
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displayable.beforeBrush && displayable.beforeBrush(ctx);
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displayable.brush(ctx, i === this._cursor ? null : this._displayables[i - 1]);
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displayable.afterBrush && displayable.afterBrush(ctx);
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}
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this._cursor = i; // Render temporary displayables.
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for (var i = 0; i < this._temporaryDisplayables.length; i++) {
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var displayable = this._temporaryDisplayables[i];
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displayable.beforeBrush && displayable.beforeBrush(ctx);
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displayable.brush(ctx, i === 0 ? null : this._temporaryDisplayables[i - 1]);
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displayable.afterBrush && displayable.afterBrush(ctx);
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}
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this._temporaryDisplayables = [];
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this.notClear = true;
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};
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var m = [];
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IncrementalDisplayble.prototype.getBoundingRect = function () {
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if (!this._rect) {
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var rect = new BoundingRect(Infinity, Infinity, -Infinity, -Infinity);
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for (var i = 0; i < this._displayables.length; i++) {
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var displayable = this._displayables[i];
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var childRect = displayable.getBoundingRect().clone();
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if (displayable.needLocalTransform()) {
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childRect.applyTransform(displayable.getLocalTransform(m));
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}
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rect.union(childRect);
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}
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this._rect = rect;
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}
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return this._rect;
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};
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IncrementalDisplayble.prototype.contain = function (x, y) {
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var localPos = this.transformCoordToLocal(x, y);
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var rect = this.getBoundingRect();
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if (rect.contain(localPos[0], localPos[1])) {
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for (var i = 0; i < this._displayables.length; i++) {
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var displayable = this._displayables[i];
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if (displayable.contain(x, y)) {
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return true;
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}
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}
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}
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return false;
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};
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inherits(IncrementalDisplayble, Displayble);
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var _default = IncrementalDisplayble;
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module.exports = _default; |